There is the Loop Solution for Java

  • 3

    I saw all the solutions are the one-line no loop solution. So I post a loop solution.

    public boolean isPowerOfFour(int num) {
            if(num == 0)
                return false;
            while(num%4  == 0){
                num = num /4;
            if(num != 1)
                return false;
            return true;

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